In patients with novel coronavirus pneumonia, the simplest test is to draw blood, to look at the blood count, and in the blood count the main thing to look at is the white blood cell situation, which is usually normal or slightly decreasing in total, and the lymphocytes should be progressively decreasing. In addition to that, it can be seen that some individual patients can have elevated muscle enzymes because there may be muscle damage, and some patients may have blood gas changes following pulmonary changes, such as the presence of hypoxemia. The patient will be given a chest radiograph or a CT of the lungs to observe the pulmonary changes. In patients with novel coronavirus pneumonia, the most common change in the lungs is hairy glass-like changes in both lungs, which may become white lungs as the disease continues to worsen. In patients with pneumonia, the lungs become white when they are damaged, or they may become white if they are large. The diagnosis of novel coronavirus pneumonia must be confirmed by nucleic acid testing, and only patients with a positive nucleic acid test can be clearly diagnosed as having novel coronavirus pneumonia. In recent times, due to the continuous efforts of various research institutions, rapid kits for nucleic acid testing have been produced, allowing for a definitive diagnosis of the patient within a few hours, greatly saving medical resources. Content source: Dr. You Lai